Accumulated Other Comprehensive Loss - Summary of Changes in Accumulated Other Comprehensive Loss by Component (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (22,234)
Transition adjustment	(1,022,770)		$ (1,088,105)
Transition adjustment	(11,926)		$ (29,080)
Ending balance	51,578
Interest Rate Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(9,363)	$ (27,819)
Gains (losses) arising during period	15,642	(370)
Amounts reclassified from accumulated other comprehensive loss	6,375	12,298
Net other comprehensive income (loss)	22,017	11,928
Ending balance	12,654	(15,891)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(16,419)	(26,623)
Gains (losses) arising during period	(6,437)	8,324
Amounts reclassified from accumulated other comprehensive loss	1,416	966
Net other comprehensive income (loss)	(5,021)	9,290
Ending balance	(21,440)	(17,333)
Accumulated Other-than-Temporary Impairment of Investment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(3,298)	(3,509)
Amounts reclassified from accumulated other comprehensive loss	158	159
Net other comprehensive income (loss)	158	159
Ending balance	(3,140)	(3,350)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(29,080)	(57,951)
Gains (losses) arising during period	9,205	7,954
Amounts reclassified from accumulated other comprehensive loss	7,949	13,423
Net other comprehensive income (loss)	17,154	21,377
Ending balance	$ (11,926)	$ (36,574)